Business And Basis Of Presentation - Narrative (Details) $ in Millions	6 Months Ended
	Jul. 01, 2022 USD ($) segment	Apr. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 02, 2021 USD ($)	Apr. 02, 2021 USD ($)	Dec. 31, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of business segments (in segments) | segment	2
Long-term Debt	$ 1,372.7		$ 1,315.8
Stockholders' equity	(4,016.0)		(4,058.0)
Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	(3,678.4)	$ (3,667.9)	(3,732.6)	$ (3,707.6)	$ (3,691.1)	$ (3,684.4)
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	$ (610.3)	$ (563.2)	(466.9)	$ (288.2)	$ (198.1)	$ (126.4)
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net deferred tax liability			18.6
Adjustment | Convertible Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term Debt			75.0
Adjustment | Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity			77.8
Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity			$ (21.4)